[jira] Commented: (DAEMON-165) Uncaught exceptions in main methods are being obscured

["John Leed (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/DAEMON-165?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12934488#action_12934488 ] 

John Leed commented on DAEMON-165:
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I don't think this issue is resolved. I was having trouble figuring out why my app wasn't working with prunsrv until I wrapped my main method with a try catch. 

I'm using 1.0.4 x86 on Windows XP with JRE 1.6.20.

> Uncaught exceptions in main methods are being obscured
> ------------------------------------------------------
>
>                 Key: DAEMON-165
>                 URL: https://issues.apache.org/jira/browse/DAEMON-165
>             Project: Commons Daemon
>          Issue Type: Bug
>          Components: Procrun
>    Affects Versions: 1.0.2, 1.0.3
>         Environment: Procrun running on windows with any java release
>            Reporter: Antony Scerri
>             Fix For: 1.0.4
>
>
> Inside the__apxJavaWorkerThread method in javajni.c the following line just after the call to execute the main method:
>     JVM_EXCEPTION_CLEAR(lpJava);
> is making any uncaught exception in the main method simply disappear. This can make diagnoising startup and/or shutdown issues in applications over which you have no direct control (ie third party apps for which you dont have sourcecode). I had this where a classpath error was causing some issues and later some other exceptions, all were completely hidden until I removed this line.
> Two solutions I believe are possible.
> 1) Simply remove this line, the VM will then handle the exception by outputting it to standard error in which case it will appear in the service stderr log file.
> 2) Check for and then obtain any exception and log appropriately
> The second would give greater control to procrun and be more prominant in the main log rather than the stderr logs.

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